Building a Structural (Engineering) Design eWorkbook – Part 1

Introduction Actually from my viewpoint not engineering because: Engineering takes place at the frontiers of science and technology. It is a high risk activity, based on highly deficient knowledge, with uncertain outcomes. The thing we are concerned with here are established technologies, with an established body of technical knowledge, making planning, design and management based […]

State of Play: 2017/wk40

The daily challenge came to an end on day 67. A daily challenge based on researching and reading would have greater staying power, but it doesn’t produce anything visual to communicate activity. All the production occurs inside the human mind, and makes the mind more knowledgeable. Any case back to random and irregular “state of […]

Example Reports and Calculations

A selection of early reports mostly collected together in an attempt to illustrate how with repetitive type projects, automation of the calculations can be incrementally implemented as move from one project to the next. Example: Portable Building My first calculations in 1988, before we formalised a business. The calculations are handwritten, involve calculation of section properties […]

Wind Speeds and Topography

The wind loading code is based on the flow of fluid parallel to a flat plate. The plate can have roughness, this roughness is measured by roughness length (z0), and converted to terrain category. Appendices to AS1170.2:1989 contained charts for surface roughness length and relationship to terrain category: this information for the newer codes, can […]

Barrier Heights, guard rails and hand rails

As I seem to have difficulty explaining the difference between handrails and guardrails and when each is needed, I have added an XY chart to my balustrade design spreadsheet so that I can illustrate the different situations. Handrails and guardrails are not the same thing. Whilst it is common for industrial guardrails to use a […]

TechNote#300 Barriers

Barriers versus: Partitions, Walls, Doors, Windows, Balustrades, Guard Rails, Hand rails, Grab Rails Codes provide no real guidance regarding classification of a structure as a barrier or a wall. AS1170.1 specifies barrier loadings to the top edge of the barrier: this doesn’t always make sense. {NB: AS1170.1 does not identify imposed loads for vertical surfaces […]

A Study Tour Wind Loading of Structures

The beginnings (eg. table of contents) of a  guided tour through various aspects of the wind loading of structures. Qualitative Overview Beaufort Windscale Chart The Recent Adelaide Wind Storms Related to Australian Wind Loading Code Design Wind Speeds for South Australia TechNote#006 Internal Pressure Coefficients Industrial/Commercial Buildings Quantitative Tools Wind Loading Risk Assessment Wind Loading BCA Importance Levels […]

The Recent Adelaide Wind Storms Related to Australian Wind Loading Code

Relating the recent Adelaide storms to the Adelaide Metro Wind Speed Map, the simplified wind classification system (AS4055), and our wind loading code (AS1170.2) The map typically classifies sites as either: N1 Vzp = 28 m/s [100.8 km/h] N2 Vzp = 33 m/s [118.8 km/h] N3 Vzp = 41 m/s [147.6 km/h] These commonly used […]

TechNote#007 Water Tank Roof Covers

Roy G Harrison,  B.Sc(Eng), MIStructE, MIEAust, CPEng Steven CONRAD Harrison,  B.Tech(Mfg & Mech.), MIIE, gradTIEAust Action Effects In 2002, the loading codes were revised and a philosophy of “Design Actions” introduced specifying criteria and procedures for the structural design of a building or structure in “Limit States” format. The design of a structure for strength […]


INTRODUCTION This guide is written to assist you (manufacturers/suppliers) with the following: Understanding the limitations of your currently held pre-engineered solutions. Assist you with developing a qualitative understanding of structures so that you can identify problems before they eventuate and seek engineering assistance to resolve them. THE GUIDE Not having a qualitative understanding of the […]